Answer: (B ) The word "But" should not be capitalized.
Explanation:
Where is the third paragraph?
No one . Because the indefinite pronoun that does not refer to any person , amount or thing in particular
Proper nouns usually understood as a noun that is capitalized . In order to be a proper noun ,like any other noun, the word must be a person place or thing. Proper nouns no matter what, are in a sentence and have is capitalized